Half a year ago, my parents remarried, and I gained an older stepsister. Recently, I finally got a girlfriend after my feelings came true, but when my older sister found out, she got jealous.
"So, you finally got a girlfriend?" my older sister said to me. "How long has it been?" "Two years? Your long-awaited girlfriend!" "Let's celebrate together." "As your sister, I'm a little lonely, but I'm happy," she continued.
"You had sex with your ex-girlfriend, right? What, are you blushing?" my older sister pressed further. "I'm your older sister, so you can talk to me about anything." "Have you already done it with Yayoi-chan (your new girlfriend)?" "Huh? You haven't? Why, why?" "Can't you make the first move?" "But I think she's waiting for you to invite her."
"You haven't had sex recently, have you?" my older sister said. "If you have sex after so long, won't you end up cumming too fast or going soft, and Yayoi-chan might hate you?"
"If my boyfriend was bad at sex or couldn't get hard, I'd get down thinking it was my fault... I'm sure your girlfriend would feel the same," my older sister continued.
"But you don't know what to do, right?" "Do you want your older sister to teach you what to do?" "It's hard to explain with just words what to do..."
"Your older sister can teach you adult sex."
And so, Miyu, worried (and jealous) that I hadn't had sex recently, became my practice partner for sex...
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